Radiator for vehicle

ABSTRACT

A radiator apparatus for a vehicle may include a main radiator supplying cooled cooling water to an engine through heat exchange with outdoor air, and a subordinate radiator disposed in parallel in front of the main radiator and supplying the cooled cooling water to an intercooler or an electronic unit through heat exchange with the outdoor air, wherein, in the main radiator, respective header tanks have different sizes and an oil cooler is incorporated in the header tank having the larger size among the respective header tanks and cools a transmission oil, wherein in the subordinate radiator, respective header tanks have different sizes and a condenser is incorporated in the header tank having the larger size among the respective header tanks and condenses refrigerant, and wherein the header tanks of the main radiator and the subordinate radiator are disposed to be opposite to each other according to the sizes.

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims priority to Korean Patent Application No.10-2013-0064912 filed on Jun. 5, 2013, the entire contents of which isincorporated herein for all purposes by this reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a radiator for a vehicle, and moreparticularly, to a radiator for a vehicle that cools cooling watersupplied to each of an engine, a motor, an electric unit, and anintercooler of an internal combustion engine through heat-exchange withoutdoor air while traveling and supplies the cooling water.

2. Description of Related Art

In general, an automobile injects mixed gas of fuel and air to an enginecylinder to transfer explosive force by compression of a piston to adriving wheel to travel, and as a result, an engine that acquires anoutput by explosion as above has a cooling device such as a water jacketin order to cool high heat by the explosion and a radiator performs afunction to cool cooling water circulated in the water jacket again.

The radiator having such a function is an air-cooled type cooled byoutdoor air according to a cooling method and is divided into across-flow radiator and a down-flow radiator according to aconfiguration format.

The cross-flow and down-flow radiators which are divided according tothe configuration format are decided according to a flow direction ofthe cooling water, and the radiator in the related art has a structurein which inlet and outlet tanks in which the cooling water is introducedand discharged are spaced apart from each other, tubes connecting theinlet and outlet tanks to each other are mounted so as to be stacked,and as a result, the cooling water flows and the cooling water thatflows is cooled by the heat exchange with outdoor air.

Herein, the cross-flow type radiator is a type in which the inlet andoutlet tanks are disposed at left and right sides and the tubes are thusmounted so as to be stacked in a lateral direction, and as a result, thecooling water is cooled while being circulated in the lateral direction.

In addition, the down-flow type radiator is a type in which the inletand outlet tanks are disposed at upper and lower sides and the tubesconnecting the respective tanks are thus mounted so as to be stacked ina vertical direction, and as a result, the cooling water is cooled whilebeing circulated in the vertical direction.

The radiator configured as above is disposed toward the front in anengine room of a general vehicle so that cool outdoor air introducedwhile traveling and the cooling water exchanges heat with each other.

Meanwhile, in recent years, an intercooler is adopted, which cools aircompressed by a turbine of a turbo charger adopted to improve an outputof the engine and supplies to the engine.

The intercooler is generally divided into an air-cooled type or awater-cooled type, and there is a tendency that application of thewater-cooled type is extended rather than the air-cooled type so as toimprove fuel efficiency through improvement of cooling performance andenhancement of a turbo rack.

In the case of the water-cooled type intercooler, cooling water cooledthrough an intercooler radiator other than a radiator that supplies thecooling water to the engine is introduced into the intercooler to coolcompressed air.

However, in the conventional radiator for a vehicle adopting thewater-cooled type intercooler is constituted by an engine radiator andan intercooler radiator to be adopted in parallel at a front side or arear side in front of the vehicle and header tanks having the same sizeare adopted, and as a result, an installation requirement space isincreased, and a space between a back beam and the engine room isdecreased, and as a result, it is difficult to secure collisionperformance.

Further, tube heights of the respective radiators that are disposed inparallel in forwards and backwards of the vehicle are disposed to bedifferent from each other, and as a result, when outdoor air introducedfrom the front of the vehicle passes though each radiator, ventilationresistance becomes excessive and heat dissipating performance of theradiator deteriorates.

The deterioration of the heat dissipating performance of the radiatorcauses the cooling water not to be cooled at a required temperature, andas a result, overall cooling efficiency of the radiator deteriorates andwhen cooling water which is not normally cooled is supplied to theengine and the intercooler, the engine and the intercooler cannot beappropriately cooled. Therefore, overall cooling performance of thevehicle also deteriorates.

The information disclosed in this Background of the Invention section isonly for enhancement of understanding of the general background of theinvention and should not be taken as an acknowledgement or any form ofsuggestion that this information forms the prior art already known to aperson skilled in the art.

BRIEF SUMMARY

Various aspects of the present invention are directed to providing aradiator for a vehicle in which respective header tanks are configuredto have different sizes, an oil cooler cooling transmission oil of anautomatic transmission and a condenser condensing refrigerant areintegrated in header tanks having the larger size, respectively, tosecure an installation space by reducing a vehicle package, and tubesdisposed at a front side and a rear side, respectively, are positionedon the same line to reduce ventilation resistance when outdoor air isintroduced.

In an aspect of the present invention, a radiator for a vehicle mayinclude a main radiator configured in front of the vehicle and supplyingcooled cooling water to an engine of an internal combustion enginethrough heat exchange with outdoor air; and a subordinate radiatordisposed in parallel in front of the main radiator and supplying thecooled cooling water to an intercooler or an electronic unit throughheat exchange with the outdoor air, and in the main radiator, respectiveheader tanks have different sizes, and an oil cooler is incorporated inthe header tank having the larger size, and cools the transmission oilthrough heat exchange with the cooling water, in the subordinateradiator, the respective header tanks have different sizes, and acondenser is incorporated in the header tank having the larger size, andcondenses refrigerant in the header tank having the larger size amongthe respective header tank, and the header tanks of the main radiatorand the subordinate radiator are disposed to be opposite to each otheraccording to the sizes.

The main radiator may include: a first header tank having the oil coolertherein and having the large size; a second header tank having a smallersize than the first header tank and disposed to be spaced apart from thefirst header tank by a predetermined gap; a plurality of first tubesmounted on an inner surface where the first header tank and the secondheader tank face each other in a height direction; and first heatdissipating fins mounted among the first tubes.

The first header tank may have a first outlet through which the coolingwater introduced into the first header tank is discharged, which isformed at a lower rear portion.

The second header tank may have a first inlet through which the coolingwater is introduced, which is formed at an upper rear portion of thesecond header tank.

The subordinate radiator includes a third header tank disposed in frontof the first header tank; a fourth header tank that has a larger sizethan the third header tank and has the condenser incorporated therein,and is disposed to be spaced apart from the third header tank by apredetermined gap to be disposed in front of the second header tank; aplurality of second tubes mounted on an inner surface where the thirdheader tank and the fourth header tank face each other in a heightdirection; and second heat dissipating fins mounted among the firsttubes.

The third header tank may have a second inlet through which coolingwater is introduced, which is formed at an upper side portion and asecond outlet through which the cooling water is discharged, which isformed at a lower side portion to correspond to the second inlet.

The second tube may have a different width from the first tube accordingto required performance an engine or an intercooler based on aforward/backward direction of the vehicle.

The first tubes and the second tubes may be disposed on the same line inheight direction of the main radiator and the subordinate radiator.

The first and second heat dissipating fins may be disposed so thatpositions where the first and second heat dissipating fins are bent aresame as each other between the first tubes and among the second tubes.

According to an exemplary embodiment of the present invention, therespective header tanks are configured to have different sizes, the oilcooler that cools the transmission oil of the automatic transmission andthe condenser that condenses the refrigerant are respectivelyincorporated in the larger header tanks to secure an installation spaceby reducing a vehicle package and manufacturing cost may be saved byreducing weight and an overall size.

The reduction of the package, weight and the entire size may improvespatial utilization in the engine room and secure a sufficient spacebetween the back beam and the engine room to improve collisionperformance.

The first and second tubes of the engine radiator and the intercoolerradiator that are arranged in parallel in the forward/backward directionof the vehicle are positioned on the same line to improve heatdissipating performance by reducing ventilation resistance when theoutdoor air is introduced.

The cooling water is cooled up to a required temperature through theimprovement of the heat dissipating performance to improve the coolingperformance of the engine and the intercooler without an increase insize and capacity.

The cooling water is cooled up to a required temperature through theimprovement of the heat dissipating performance to improve the coolingperformance of the engine and the intercooler without an increase insize and capacity.

The methods and apparatuses of the present invention have other featuresand advantages which will be apparent from or are set forth in moredetail in the accompanying drawings, which are incorporated herein, andthe following Detailed Description, which together serve to explaincertain principles of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a rear projection perspective view of a radiator for a vehicleaccording to an exemplary embodiment of the present invention.

FIG. 2 is a front view illustrating the radiator for a vehicle accordingto the exemplary embodiment of the present invention.

FIG. 3 is a rear view illustrating the radiator for a vehicle accordingto the exemplary embodiment of the present invention.

FIG. 4 is a plan view illustrating the radiator for a vehicle accordingto the exemplary embodiment of the present invention.

FIG. 5 is a perspective view illustrating a layout state of a tube and aheat dissipating fin in the radiator for a vehicle according to theexemplary embodiment of the present invention.

It should be understood that the appended drawings are not necessarilyto scale, presenting a somewhat simplified representation of variousfeatures illustrative of the basic principles of the invention. Thespecific design features of the present invention as disclosed herein,including, for example, specific dimensions, orientations, locations,and shapes will be determined in part by the particular intendedapplication and use environment.

In the figures, reference numbers refer to the same or equivalent partsof the present invention throughout the several figures of the drawing.

DETAILED DESCRIPTION

Reference will now be made in detail to various embodiments of thepresent invention(s), examples of which are illustrated in theaccompanying drawings and described below. While the invention(s) willbe described in conjunction with exemplary embodiments, it will beunderstood that the present description is not intended to limit theinvention(s) to those exemplary embodiments. On the contrary, theinvention(s) is/are intended to cover not only the exemplaryembodiments, but also various alternatives, modifications, equivalentsand other embodiments, which may be included within the spirit and scopeof the invention as defined by the appended claims.

An exemplary embodiment of the present invention will hereinafter bedescribed in detail with reference to the accompanying drawings.

Prior to this, configurations illustrated in the embodiments and thedrawings described in the present specification are only the mostpreferred embodiment of the present invention and do not represent allof the technical spirit of the present invention, and thus it is to beunderstood that various modified examples, which may replace theconfigurations, are possible when filing the present application.

In addition, unless explicitly described to the contrary, the word“comprise” and variations such as “comprises” or “comprising”, will beunderstood to imply the inclusion of stated elements but not theexclusion of any other elements.

Further, terms such as “-unit”, “-means”, “-part”, “-member”, etc. meanunits of comprehensive configurations that performs at least onefunction or operation.

FIG. 1 is a rear projection perspective view of a radiator for a vehicleaccording to an exemplary embodiment of the present invention. FIGS. 2and 3 are a front view and a rear view of the radiator for a vehicleaccording to the exemplary embodiment of the present invention. FIG. 4is a plan view illustrating the radiator for a vehicle according to theexemplary embodiment of the present invention. FIG. 5 is a perspectiveview illustrating a layout state of a tube and a heat dissipating fin inthe radiator for a vehicle according to the exemplary embodiment of thepresent invention.

Referring to the figures, the radiator 100 for a vehicle according tothe exemplary embodiment of the present invention has a structure inwhich respective header tanks 111, 113, 121, and 123 are configured tohave different sizes, an oil cooler 130 cooling transmission oil of anautomatic transmission and a condenser 140 condensing refrigerant areincorporated in header tanks 111 and 123 having the larger size,respectively, to secure an installation space by reducing a vehiclepackage, and tubes disposed at a front side and a rear side,respectively are positioned on the same line to reduce ventilationresistance when outdoor air is introduced.

To this end, as illustrated in FIGS. 1 to 4, the radiator 100 for avehicle according to the exemplary embodiment of the present inventionis configured to include a main radiator 110 configured in front of thevehicle and supplying cooled cooling water to an engine of an internalcombustion engine through heat exchange with outdoor air and asubordinate radiator 120 disposed in parallel at a position spaced apartfrom the main radiator 110 by a predetermined gap in front of the mainradiator 110 and supplying the cooled cooling water to an intercooler oran electronic unit through heat exchange with the outdoor air.

The radiator 100 cools cooling water that flows therein through windthat is blown from a cooling fan mounted at an engine room side.

Herein, in the main radiator 110, the respective header tanks 111 and113 have different sizes, and an oil cooler 130 is incorporated in theheader tank 111 having the larger size between the respective headertanks 111 and 113, in which the oil cooler 130 is connected with anautomatic transmission through an oil pipe 131 to circulate transmissionoil and cools the transmission oil through heat exchange with thecooling water.

The main radiator 110 may be configured to include the first header tank111 that has the oil cooler 130 incorporated therein and has a largesize, a second header tank 113 that has a smaller size than the firstheader tank 111 and is disposed to be spaced apart from the first headertank 111 by a predetermined gap, a plurality of first tubes 115 mountedon inner surfaces where the first header tank 111 and the second headertank 113 face each other in a height direction, and first heatdissipating fins P1 respectively mounted among the first tubes 115.

In the exemplary embodiment, the first header tank 111 has a firstoutlet 119 formed at a lower rear portion thereof, through which thecooling water introduced into the first header tank 111 is discharged.

In addition, the second header tank 113 has a first inlet 117, throughwhich the cooling water is introduced, which is formed at an upper rearportion to correspond to the first outlet 119 of the first header tank111.

That is, in the main radiator 110, when cooling water that completescooling of the engine is introduced into the second header tank 113through the first inlet 117, the cooling water moves to the first headertank 111 through the first tubes 115 and is cooled through heat exchangewith the outdoor air, and the cooled cooling water is discharged throughthe first outlet 119 and supplied to the engine again.

Herein, the oil cooler 130 is connected with an automatic transmissionthrough the oil pipe 131 in the first header tank 111 having the largesize, and as a result, transmission oil is circulated therein, and thetransmission oil is cooled through heat exchange with the cooling waterthat passes through the first header tank 111.

The transmission oil cooled through the oil cooler 130 is supplied tothe automatic transmission to complete cooling of the automatictransmission and thereafter, is introduced into the oil cooler 130 againto be circulated.

In the exemplary embodiment, in the subordinate radiator 120, therespective header tanks 121 and 123 have different sizes similarly asthe main radiator 110, and in the header tank 123 having the large sizebetween the respective header tanks 121 and 123, a compressor and anevaporator are connected with each other through a refrigerant pipe 141,and as a result, refrigerant is circulated, and a condenser 140 thatcondenses the refrigerant through heat exchange with the cooling wateris incorporated.

The subordinate radiator 120 may be configured to include a third headertank 121 disposed in front of the first header tank 111, a fourth headertank 123 that has a larger size than the third header tank 121, has thecondenser 140 therein, is disposed to be spaced apart from the thirdheader tank 121 by a predetermined gap and disposed in front of thesecond header tank 113, a plurality of second tubes 125 mounted on innersurfaces where the third header tank 121 and the fourth header tank 123face each other in a height direction, and second heat dissipating finsP2 mounted among the second tubes 125.

Herein, the third header tank 121 may have a second inlet 127 formed atan upper side portion through which the cooling water is introduced anda second outlet 129, through which the cooling water is discharged,formed at an upper side portion of the fourth header tank 123 tocorrespond to the second inlet 127.

That is, in the subordinate radiator 120, when cooling water thatcompletes cooling of the intercooler or the electronic unit isintroduced into the third header tank 121 through the second inlet 127,the cooling water moves to the fourth header tank 123 through the secondtubes 125 and is cooled through heat exchange with the outdoor air, andthe cooled cooling water is discharged through the second outlet 129 andsupplied to the intercooler or the electronic unit again.

Meanwhile, the condenser 140 is provided in the fourth header tank 123having the large size and the refrigerant supplied from the compressoris circulated through the refrigerant pipe 141, and the refrigerant iscondensed through heat exchange with the cooling water that passesthrough the fourth header tank 123.

Herein, the condenser 140 condenses the refrigerant which if circulatedin the condenser 140 by using the cooled cooling water which isheat-exchanged with the outdoor air while being introduced from thethird header tank 121 and passing through the second tubes 125, and isintroduced into the fourth header tank 123.

The refrigerant cooled and condensed through the condenser 140 issupplied to the evaporator and introduced again into the condenser 140from the evaporator through the compressor to be circulated.

In the exemplary embodiment, the first tubes 115 and the second tubes125 are mounted to be spaced apart from each other at a regular gapamong the respective header tanks 111, 113, 121, and 123 that face eachother as illustrated in FIG. 5 in a height direction of the vehicle.

Herein, a width of the second tube 125 may be different from a width ofthe first tube 115 according to required performance of the engine orthe intercooler based on a forward/backward direction of the vehicle andin the exemplary embodiment, the width of the second tube 125 may belarger than the width of the first tube 11.

When the cooling water flows from the second header tank 113 to thefirst header tank 111 and when the cooling water flows from the thirdheader tank 121 to the fourth header tank 123, the first tubes 115 andthe second tubes 125 dissipate to the outside heat transferred from thecooling water that flows.

In the exemplary embodiment, the width of the first tube 115 may beconfigured to be approximately 14 mm and the width of the second tube125 may be configured to be approximately 18 mm. As a result, thecooling water that passes through the second tube 125 flows at a largerflow amount than that of the cooling water that flows through the firsttube 115.

Meanwhile, in the exemplary embodiment, it is described as one exemplaryembodiment that the width of the second tube 125 is larger than thewidth of the first tube 115, and as a result, the flow amount of thecooling water is different, but the present invention is not limitedthereto and the changed lengths of the respective tubes 115 and 125 maybe applied according to the performance of the engine and theintercooler, and as a result, the flow amount of the cooling that flowsmay be controlled.

Herein, the first tubes 115 and the second tubes 125 connect the firstand second header tanks 111 and 113 to each other, which face each otherin height directions of the main radiator 110 and the subordinateradiator 120, and connect the third and fourth header tanks 121 and 123so as to be disposed on the same line.

In addition, the first and second heat dissipating fins P1 and P2 may bedisposed so that the positions where the first and second heatdissipating pins P1 and P2 are bent between the first tubes 115 andbetween the second tubes 125 are the same as each other.

In the main radiator 110 and the subordinate radiator 120 configured asabove, the respective header tanks 111, 113, 121, and 123 may bedisposed in opposite directions to each other according to the sizesthereof.

That is, the first header tank 111 and the fourth header tank 123 thathave the large size are positioned at opposite sides to each other in awidth direction of the vehicle and the second header tank 113 and thethird header tank 121 that have the small size are also positioned atopposite sides to each other in the width direction of the vehicle.

As a result, the main radiator 110 and the subordinate radiator 120 maybe disposed so as to minimize an arrangement space, and as a result, thethickness thereof may be decreased, thereby improving spatialutilization.

Further, in the radiator 100, the respective tubes 115 and 125 aredisposed on the same line in the height direction of the vehicle and thepositions where the first and second heat dissipating fins P1 and P2 arebent are the same as each other, and as a result, when the outdoor airis introduced to pass, ventilation resistance of the outdoor air isdecreased and the outdoor air flows more smoothly, while the vehicletravels. Accordingly, the radiator 100 has improved overall heatdissipating performance to increase cooling efficiency of the coolingwater.

In this case, the subordinate radiator 120 is connected through thesecond tube 125 which has the larger width than the first tube 115, andas a result, the flow amount of the cooling water that flows isincreased, thereby improving cooling efficiency of the condenser 140that is incorporated in the fourth header tank 123.

Meanwhile, in describing the radiator 100 for a vehicle according to theexemplary embodiment, it is described as one exemplary embodiment thatthe radiator 100 is constituted by the main radiator 110 that suppliesthe cooled cooling water to the engine and the subordinate radiator 120that supplies the cooled cooling water to the intercooler, but thepresent invention is not limited thereto and the cooling water issupplied to the engine and a driving part which substitutes for theengine, and an electronic unit which substitutes for the intercooler inan environment-friendly vehicle such as an electric vehicle, a hybridvehicle.

Accordingly, when the radiator 100 for a vehicle according to theexemplary embodiment of the present invention configured as above isadopted, the respective header tanks 111, 113, 121, and 123 areconfigured to have different sizes, the oil cooler 130 that cools thetransmission oil of the automatic transmission is incorporated in thefirst header tank 111 having the large size, and the condenser 140 thatcondenses the refrigerant is incorporated in the fourth header tank 123to secure an installation space by reducing a vehicle package and reducemanufacturing cost by reducing weight and an overall size.

The reduction of the package, weight and the entire size may improvespatial utilization in the engine room and secure a sufficient spacebetween the back beam and the engine room to improve collisionperformance

The first and second tubes 115 and 125 of the main radiator 110 and thesubordinate radiator 120 that are arranged in parallel in theforward/backward direction of the vehicle are positioned on the sameline to improve heat dissipating performance by reducing ventilationresistance when the outdoor air is introduced.

The cooling water is cooled up to a required temperature through theimprovement of the heat dissipating performance to improve the coolingperformance of the engine and the intercooler without an increase insize and capacity.

The oil cooler 130 and the condenser 140 are incorporated in the firstand fourth header tanks 111 and 123 of the respective radiators 110 and120, respectively to be configured as the water-cooled type, therebyimproving cooling efficiency of the refrigerant and the transmissionoil.

For convenience in explanation and accurate definition in the appendedclaims, the terms “upper”, “lower”, “inner” and “outer” are used todescribe features of the exemplary embodiments with reference to thepositions of such features as displayed in the figures.

The foregoing descriptions of specific exemplary embodiments of thepresent invention have been presented for purposes of illustration anddescription. They are not intended to be exhaustive or to limit theinvention to the precise forms disclosed, and obviously manymodifications and variations are possible in light of the aboveteachings. They are not intended to be exhaustive or to limit theinvention to the precise forms disclosed, and obviously manymodifications and variations are possible in light of the aboveteachings as well as various alternatives and modifications thereof. Itis intended that the scope of the invention be defined by the Claimsappended hereto and their equivalents.

What is claimed is:
 1. A radiator apparatus for a vehicle, comprising: amain radiator configured for being disposed in front of the vehicle andsupplying cooled cooling water to an engine through heat exchange withoutdoor air; and a subordinate radiator disposed in parallel in front ofthe main radiator and supplying the cooled cooling water to anintercooler or an electronic unit through heat exchange with the outdoorair, wherein, in the main radiator, respective header tanks havedifferent sizes and an oil cooler is incorporated in the header tankhaving the larger size among the respective header tanks and cools atransmission oil, wherein in the subordinate radiator, respective headertanks have different sizes and a condenser is incorporated in the headertank having the larger size among the respective header tanks andcondenses refrigerant, and wherein the header tanks of the main radiatorand the subordinate radiator are disposed to be opposite to each otheraccording to the sizes.
 2. The radiator for the vehicle of claim 1,wherein the main radiator includes: a first header tank having the oilcooler therein and having the larger size; a second header tank having asmaller size than the first header tank and disposed to be spaced apartfrom the first header tank by a predetermined gap; a plurality of firsttubes mounted on an inner surface where the first header tank and thesecond header tank face each other in a height direction; and first heatdissipating fins mounted among the first tubes.
 3. The radiator for thevehicle of claim 2, wherein the first header tank has a first outlet,through which the cooling water introduced into the first header tank isdischarged, which is formed at a lower rear portion.
 4. The radiator forthe vehicle of claim 2, wherein the second header tank has a firstinlet, through which the cooling water is introduced, which is formed atan upper rear portion of the second header tank.
 5. The radiator for thevehicle of claim 2, wherein the subordinate radiator includes: a thirdheader tank disposed in front of the first header tank; a fourth headertank that has a larger size than the third header tank and has thecondenser incorporated therein, and is disposed to be spaced apart fromthe third header tank by a predetermined gap to be disposed in front ofthe second header tank; a plurality of second tubes mounted on an innersurface where the third header tank and the fourth header tank face eachother in a height direction; and second heat dissipating fins mountedamong the second tubes.
 6. The radiator for the vehicle of claim 5,wherein the third header tank has: a second inlet, through which coolingwater is introduced, which is formed at an upper side portion; and asecond outlet, through which the cooling water is discharged, which isformed at a lower side portion of the fourth header tank to correspondto the second inlet.
 7. The radiator for the vehicle of claim 3, whereinthe second tube has different width from the first tube according to theperformance required by the engine, an intercooler or an electronic unitbased on a forward/backward direction of the vehicle.
 8. The radiatorfor the vehicle of claim 5, wherein the first tubes and the second tubesare disposed on the same line in height direction of the main radiatorand the subordinate radiator.
 9. The radiator for the vehicle of claim5, wherein the first and second heat dissipating fins are disposed sothat positions where the first and second heat dissipating fins are bentare the same as each other between the first tubes and between thesecond tubes.